Colo. makes its path to 100% renewables by walking

Colorado Gov.-elect Jared Polis wants to run the state on 100 percent renewable energy by 2040. He says it’s not a mandate but an aspiration that would reduce greenhouse gas emissions. And that’s good because even towns already on the quest aren’t sure how to meet the goal or what it might cost.

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In this TEDxUIdaho talk delivered in April and uploaded to YouTube on Monday, Margaret Donelick proposes repurposing abandoned mine sites, such as the Berkeley Pit in Butte, Montana, to create renewable energy power plants: